Question 1

Petroleum extracted from oceanic deposits today is most likely derived from ancient

Accepted Answer

A)  foraminiferans. 
B)  diatoms. 
C)  radiolarians. 
D)  brown algae. 
E)  dinoflagellates. 
A)  foraminiferans. 
B)  diatoms. 
C)  radiolarians. 
D)  brown algae. 
E)  dinoflagellates.

Question 2

Phytoplankton are plankton that perform _______.

Accepted Answer

The answer of Phytoplankton are plankton that perform _______....

Question 3

Refer to the figure.   The figure shows a micrograph of Plasmodium cysts lining the wall of a mosquito's gut. The cells that will emerge from these structures are called _______ and will contain a _______ nucleus.

Accepted Answer

A)  merozoites; haploid 
B)  merozoites; diploid 
C)  sporozoites; haploid 
D)  sporozoites; diploid 
E)  gametes; haploid 
A)  merozoites; haploid 
B)  merozoites; diploid 
C)  sporozoites; haploid 
D)  sporozoites; diploid 
E)  gametes; haploid

Question 4

In alternation of generations, the

Accepted Answer

A)  haploid generation produces spores. 
B)  diploid generation produces gametes. 
C)  haploid and diploid organisms always resemble each other. 
D)  diploid organism produces spores. 
E)  haploid organism produces gametes by meiosis. 
A)  haploid generation produces spores. 
B)  diploid generation produces gametes. 
C)  haploid and diploid organisms always resemble each other. 
D)  diploid organism produces spores. 
E)  haploid organism produces gametes by meiosis.

Question 5

Which of the following can cause rats to lose their fear of cats?

Accepted Answer

A)  Giardia, one of the excavates 
B)  Toxoplasma, an apicomplexan 
C)  Trichomonas vaginalis, a parabasalid 
D)  Amoebas of the heterolobosean genus Naegleria 
E)  Dinoflagellates of the genus Alexandrium 
A)  Giardia, one of the excavates 
B)  Toxoplasma, an apicomplexan 
C)  Trichomonas vaginalis, a parabasalid 
D)  Amoebas of the heterolobosean genus Naegleria 
E)  Dinoflagellates of the genus Alexandrium

Question 6

What feature of eukaryotes makes endosymbiosis possible?

Accepted Answer

A)  Nuclear membrane 
B)  Mitochondria 
C)  Flexible cell membrane 
D)  Digestive vacuoles 
E)  Flagella 
A)  Nuclear membrane 
B)  Mitochondria 
C)  Flexible cell membrane 
D)  Digestive vacuoles 
E)  Flagella

Question 7

While out hiking, you drink water from a stream.Several days later you feel sick with diarrhea and intestinal bloating.Your doctor collects a stool sample and finds unicellular organisms that lack mitochondria and have multiple flagella.You are most likely infected with

Accepted Answer

A)  slime molds. 
B)  the diplomonad Giardia. 
C)  kinetoplastid trypanosomes. 
D)  the ciliate Paramecium. 
E)  testate amoebozoans. 
A)  slime molds. 
B)  the diplomonad Giardia. 
C)  kinetoplastid trypanosomes. 
D)  the ciliate Paramecium. 
E)  testate amoebozoans.

Question 8

Which of the following are not monophyletic?

Accepted Answer

A)  Diplomonads 
B)  Microbial eukaryotes 
C)  Animals 
D)  Red algae 
E)  Plants 
A)  Diplomonads 
B)  Microbial eukaryotes 
C)  Animals 
D)  Red algae 
E)  Plants

Question 9

_______ are marine microbial eukaryotes that secrete shells of calcium carbonate.These microbial eukaryotes are valuable in the geological dating of sedimentary rocks.

Accepted Answer

The answer of _______ are marine microbial eukaryotes that secrete...

Question 10

While examining a microbial eukaryote under a microscope, you notice small membrane-enclosed sacs surrounding the bases of what look like cilia.These sacs are most likely _______, and they function to support the cell surface.

Accepted Answer

The answer of While examining a microbial eukaryote under a...

Question 11

The increasing concentration of atmospheric oxygen in Earth's early atmosphere

Accepted Answer

A)  was favorable to most prokaryotes because of their small size. 
B)  was fatal to numerous eukaryotes because they possessed mitochondria 
C)  conferred a selective advantage to a eukaryote that possessed a mitochondrion. 
D)  conferred a selective advantage to a eukaryote that possessed a chloroplast. 
E)  conferred a selective advantage to prokaryotes because of their stiff membranes. 
A)  was favorable to most prokaryotes because of their small size. 
B)  was fatal to numerous eukaryotes because they possessed mitochondria 
C)  conferred a selective advantage to a eukaryote that possessed a mitochondrion. 
D)  conferred a selective advantage to a eukaryote that possessed a chloroplast. 
E)  conferred a selective advantage to prokaryotes because of their stiff membranes.

Question 12

Which statement regarding the alternation of generations is true?

Accepted Answer

A)  Spores can produce new organisms only by fusing with other spores. 
B)  Gametes can produce new organisms only by fusing with other gametes. 
C)  Gametes are diploid and must undergo meiosis prior to fusing. 
D)  The gamete-producing and spore-producing generations are always morphologically different. 
E)  The gamete-producing and spore-producing generations are always morphologically similar. 
A)  Spores can produce new organisms only by fusing with other spores. 
B)  Gametes can produce new organisms only by fusing with other gametes. 
C)  Gametes are diploid and must undergo meiosis prior to fusing. 
D)  The gamete-producing and spore-producing generations are always morphologically different. 
E)  The gamete-producing and spore-producing generations are always morphologically similar.

Question 13

In the alternation of generations, the gametophyte generation is _______ and produces _______.

Accepted Answer

A)  haploid; spores 
B)  haploid; gametes 
C)  diploid; spores 
D)  diploid; gametes 
E)  haploid or diploid; spores 
A)  haploid; spores 
B)  haploid; gametes 
C)  diploid; spores 
D)  diploid; gametes 
E)  haploid or diploid; spores

Question 14

The red tides that can kill tons of fish are caused by toxic species of _______.

Accepted Answer

The answer of The red tides that can kill tons...

Question 15

Increases in atmospheric oxygen benefitted early eukaryotes.Which statement concerning this phenomenon is false?

Accepted Answer

A)  It killed off numerous prokaryotes, thus reducing competition for resources. 
B)  It became an essential component of energy metabolism. 
C)  The flexible cell membrane allowed acquisition of more oxygen through diffusion. 
D)  Increased energy facilitated development of more cellular complexity. 
E)  Oxygen could be eliminated by contractile vacuoles. 
A)  It killed off numerous prokaryotes, thus reducing competition for resources. 
B)  It became an essential component of energy metabolism. 
C)  The flexible cell membrane allowed acquisition of more oxygen through diffusion. 
D)  Increased energy facilitated development of more cellular complexity. 
E)  Oxygen could be eliminated by contractile vacuoles.

Question 16

Which organisms are not considered protists?

Accepted Answer

A)  Diatoms 
B)  Algae 
C)  Slime molds 
D)  Sponges 
E)  Giant kelp 
A)  Diatoms 
B)  Algae 
C)  Slime molds 
D)  Sponges 
E)  Giant kelp

Question 17

Which statement about a flexible cell membrane is false?

Accepted Answer

A)  It can increase the surface area-to-volume ratio. 
B)  It makes endocytosis possible. 
C)  It makes movement by pseudopods possible. 
D)  It makes photosynthesis possible. 
E)  It has allowed formation of a nuclear membrane. 
A)  It can increase the surface area-to-volume ratio. 
B)  It makes endocytosis possible. 
C)  It makes movement by pseudopods possible. 
D)  It makes photosynthesis possible. 
E)  It has allowed formation of a nuclear membrane.

Question 18

Which statement about foraminiferans is false?

Accepted Answer

A)  They can form shells that are composed of silica. 
B)  Limestone deposits are the shells of ancient foraminiferans. 
C)  The sand of some beaches is made up of the shells of foraminiferans. 
D)  Foraminiferan fossils are useful in the classification of sedimentary rocks. 
E)  Foraminiferan fossils are useful in estimating global temperatures at the time of shell formation. 
A)  They can form shells that are composed of silica. 
B)  Limestone deposits are the shells of ancient foraminiferans. 
C)  The sand of some beaches is made up of the shells of foraminiferans. 
D)  Foraminiferan fossils are useful in the classification of sedimentary rocks. 
E)  Foraminiferan fossils are useful in estimating global temperatures at the time of shell formation.

Question 19

Refer to the figure.   This phylogenetic tree shows one current hypothesis and estimated time line for the origin of the major groups of eukaryotes.Which clade of eukaryotes was the first to diverge from other eukaryotes?

Accepted Answer

A)  Alveolates 
B)  Rhizarians 
C)  Excavates 
D)  Amoebozoans 
E)  Plantae 
A)  Alveolates 
B)  Rhizarians 
C)  Excavates 
D)  Amoebozoans 
E)  Plantae

Question 20

Which statement about the micronucleus and macronucleus is false?

Accepted Answer

A)  The macronucleus is involved in genetic recombination. 
B)  The micronucleus is a typical eukaryotic nucleus. 
C)  Multiple copies of macronuclear genes are commonly found. 
D)  Transcription and translation involve genes found mostly in the macronucleus. 
E)  The micronucleus and macronucleus are unique to ciliates. 
A)  The macronucleus is involved in genetic recombination. 
B)  The micronucleus is a typical eukaryotic nucleus. 
C)  Multiple copies of macronuclear genes are commonly found. 
D)  Transcription and translation involve genes found mostly in the macronucleus. 
E)  The micronucleus and macronucleus are unique to ciliates.

Exam 26: The Origin and Diversification of Eukaryotes

Petroleum extracted from oceanic deposits today is most likely derived from ancient

Phytoplankton are plankton that perform _______.

Refer to the figure. The figure shows a micrograph of Plasmodium cysts lining the wall of a mosquito's gut. The cells that will emerge from these structures are called _______ and will contain a _______ nucleus.

In alternation of generations, the

Which of the following can cause rats to lose their fear of cats?

What feature of eukaryotes makes endosymbiosis possible?

While out hiking, you drink water from a stream.Several days later you feel sick with diarrhea and intestinal bloating.Your doctor collects a stool sample and finds unicellular organisms that lack mitochondria and have multiple flagella.You are most likely infected with

Which of the following are not monophyletic?

_______ are marine microbial eukaryotes that secrete shells of calcium carbonate.These microbial eukaryotes are valuable in the geological dating of sedimentary rocks.

While examining a microbial eukaryote under a microscope, you notice small membrane-enclosed sacs surrounding the bases of what look like cilia.These sacs are most likely _______, and they function to support the cell surface.

The increasing concentration of atmospheric oxygen in Earth's early atmosphere

Which statement regarding the alternation of generations is true?

In the alternation of generations, the gametophyte generation is _______ and produces _______.

The red tides that can kill tons of fish are caused by toxic species of _______.

Increases in atmospheric oxygen benefitted early eukaryotes.Which statement concerning this phenomenon is false?

Which organisms are not considered protists?

Which statement about a flexible cell membrane is false?

Which statement about foraminiferans is false?

Refer to the figure. This phylogenetic tree shows one current hypothesis and estimated time line for the origin of the major groups of eukaryotes.Which clade of eukaryotes was the first to diverge from other eukaryotes?

Which statement about the micronucleus and macronucleus is false?

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Communication and Multicellularity

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinant Dna and Biotechnology

Mechanisms of Evolution

Reconstructing and Using Phylogenies

Speciation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria, Archaea, and Viruses

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

The Evolution and Diversity of Fungi

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons, Glia, and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Functions

Musculoskeletal Systems

Gas Exchange

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen Excretion

Animal Behavior

The Physical Environment and Biogeography of Life

Populations

Species Interactions

Communities

Ecosystems

A Changing Biosphere

Filters

Refer to the figure. The figure shows a micrograph of Plasmodium cysts lining the wall of a mosquito's gut. The cells that will emerge from these structures are called _ and will contain a _ nucleus.

In the alternation of generations, the gametophyte generation is _ and produces _.